Carriage & Carriage Components - Epson StylusPRO 7000 Service Manual

EPSON Stylus Pro 7000
CARRIAGE & CARRIAGE COMPONENTS
Like the EPSON Stylus Pro 9000, the SP 7000 uses a special system to ensure
the distance between the printhead nozzles and paper remains the same for
all supported paper types. The carriage is composed of two sections; main
carriage and subcarriage. The main carriage attaches to the CR Guide Rail
using bearings and supports the subcarriage. The subcarriage contains the
ink cavities, printheads, and so on.
Carriage
PG Cam
PG Gear
PG Gear
Extension
Printhead
(printhead slots)
Figure 2-8. Carriage Mechanism & CR Guide Rail (side view)
The subcarriage can be moved closer or further away from the platen using
the PG Cam which is driven by the PG Gear. The distance changes according
to the position of the PG Cam.
Operating Principles
CR Guide Rail
(frame span)
Bearings
Subcarriage
Description of Components
Do not remove or loosen the screws that secure the CR guide
C A U T I O N
rail, also do not remove the carriage. These parts are adjusted
to 1/100th of a mm at the factory.
The printheads are the same type used in the EPSON Stylus Pro 9000 and are
installed in the same way. Therefore, after replacing the printheads, perform
head parallelism adjustment and height adjustment to make sure neither
head leans one way or the other and make sure the printhead nozzles are
exactly even. To adjust the heads, separate adjust levers are provided.
Other sensors and components attached to or related to the carriage are:
"
P-EDGE sensor
This sensor measures the distance between the right and left edges of
the paper. Where paper exists, the light emitted from the sensor is
reflected back to the sensor. In this way the sensor determines the
right and left paper-edge positions and the width of the paper. For
more details, see "Paper size detection - right and left edges" on
page 74.
Left
edge
Paper
Figure 2-9. Paper width sensor
Revision A
Carriage
Right
edge
HP side
Paper Width
sensor
62